Home / 143,988.07-198,698.89-78,574.39

Finding the Fourth Proportional to 143,988.07, 198,698.89 and 78,574.39

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Solution

The fourth proportional to 143,988.07, 198,698.89 and 78,574.39 is: 108,430.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,988.07 : 198,698.89 = 78,574.39 : x
  2. Step 2: Convert to fraction form
    143,988.07/198,698.89 = 78,574.39/x
  3. Step 3: Cross multiply
    143,988.07x = 198,698.89 × 78,574.39
  4. Step 4: Simplify right side
    143,988.07x = 15,612,644,075.43
  5. Step 5: Solve for x
    x = 15,612,644,075.43/143,988.07
  6. Step 6: Final answer
    x = 108,430.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.